Improvement in eatohet-beaoe oe levee



T. A. WESTON, OF BUFFALO, N'VEW-Y'ORYK.

Letters Patent No. 75,092, dated llareh 3, 1868.

IMPROVEMENT IN RATGHET-BRAGE 0R LEVER.

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TO ALL ifi/EOM Til MY OONOERN:

Be it known that I, T. A. WESTON, of Buinlo, in the county of' Erie,:indvStnte of NewYork, have invented n certain new und usefulImprovement in Rntehetrnces or Levers; andi-I do hereby dechire thatthe' following is n. full and exact description thereof, reference beinghad tothe accompnnying drawings, making part of this specification.l

Figure 1 is an eleva-tion of my improved device.

Figure 2, efplnn of the operating end.

Figure 3, n vertical angular section in plane .c .'r.

Figure 4, f1, view showing the spring-arrangement of the pewls.

VLike letters of reference indica-te corresponding parts in all thefigures.

I embody in this improvement my differential principle of teeth andpnwls, viz, the employment of an uncflluel relative number of'saidlpnrts, whereby I nm enabled to attain, by the use oi'compnrat-ively large teeth, the some nicety of ndjustment or engagementes is attained by the nseof n grant number of smnll teeth, whilo'the.great .wear n'nd slight hold ofthe latter areevoided.

I do not claim this principle in the present epplicatiomhut only thespecial arrangement of a. doublernteh'eted head with the end of thelever, forming e strap. resting centrally between the'two sets of teeth,with spring-pnwls on opposite sides piaying alternately therein ;y also,the arrangement of the spring-pnwls.

l 'In the drewings, A indicates the lever or handle', B theratchet-head, and O C the pnwls.' The end of the lever or handle isformed into a strap or eye, a, which centrally eneireles the rntchct-hend,` hnving n. washer, b, on euch side, as shown. The ratchet-hondis providedwith two sets of teeth, c e, on opposite-sides ofl the strap,With these', respectively, engage the .two puwls, C C, hohl by thesingle bolt or pivot d, on opposite sides of the handle. "Ihese panlsengage alternately with the teeth, that is, when one isengnged (as ntthe top, in fig. 1,)

' the other is disengaged, (as at the'bottoru,) so .thntdoublc thenumber of engagements are secured thnt''would be if' hut asingle pawlwereemployed. 'lhe puwls are i'ormed hollow en their inner sides, asshown ntf, and receive springs gg, 'attached at one end lo studs h 7ici" the handle, while the other end passes n'iound the pivot, andextendsto the opposite end ofthe pnwlsthlereby holding them up toengagement with theteeth. This construction is clearly shown in figs. 3:1nd 4. I

By thus constructing the rzitchet-heud with double sets of teeth, andengaging therewith the double pnwls C C, I place the whole in u nent andcompnct.`o1in,. and insure greet simplicity and cheepness. Besides this,the double hearing of' the pnwls on opposite sitlcsoi` the centre hns:xtendeney 'to brace the action, and produce n. more regular `anduniform movement than would otherwise be attained. By this construction,else, there is less liability of disarrnngement, and, if'such doesoccur, the parts nre very easily separated and rep'lnced. 'Iheconnection of the pnwls to the one pivot, d, and thevarrnngenient of.thes'prings g therewith, insure great simplicity in construction.

What I claim as my invention, and desire to secure by Letters Patent,is"- 'Ihe special construction and nrrnngement of the doubleratchet-head B, with the end of the lever, forming a. sti-np, a, restingcentrnlly between the sets oF rntchet-teeth und the spring-pnwlsC C, onopposite sides, playing alternately iu'snid teeth, the whole operatingin .the manner und for thc purpose specified.

I nlso claim the special construction und nrrnngenient of the pnwlsconnecting with the one pivot d, and formed hollow, und receiving thesprings r/ y, the whole opern'ting in the innnner und for thepurpose setforth In witness whereof,-I have hereunto signed my nome inthe presenceof two subscribing witnesses.

' T. A. WESTON.

Witnesses:

JAY HYATT, ,TnoMAs C. HOLMES.

